Print Without Commented Out Lines on SSH / CLI

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Users searches with different phrases like how to cat and remove commented lines. Here is How to Print Without Commented Out Lines on SSH/CLI. PRINT is the right phrase. There are many tools and combination of commands to do the same work. Why only cat, there are many other animals on this Earth! Whatever you use, you probably need to use unix pipe.

When We Need to Print Without Commented Out Lines on SSH/CLI

We are using unix and GNU/Linux for over 1.5 decades. We know the approximate location of a string in the php.ini file, even some times the line number remains in memory. php.ini is an ugly file with billions of comments. The production files looks like a documentation. It is difficult to search for a group of string which can not be filtered out with simple grep.

We are not writing anything to the file.

How to Print Without Commented Out Lines on SSH/CLI

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We can find php.ini by running any of the commands, just for this example :

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locate php.ini

php--ini

Take that, we’ll work with this file :

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/etc/php5/cgi/php.ini

if you directly cat :

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cat/etc/php5/cgi/php.ini

it gives a horrible result. Any of these two commands :

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sed-e'/^;/d'/etc/php5/cgi/php.ini

cat/etc/php5/cgi/php.ini|perl-lne"print unless /^;/"

will keep the white spaces, which is not EXACTLY what normally wanted. To make the white spaces collapsed, we can run :

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cat/etc/php5/cgi/php.ini|grep-E-v"^\s*($|;)"

this will remove all the commented out lines with ; and collapse the white spaces. As it is difficult to remember the bigger size command, we can make it a script. We have kept it as a Github project here.

Script of few lines :

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#!/bin/bash-e

#gnu gpl3.0

#dr.abhishek ghosh

#thecustomizewindows.com

echo" "

echo"Supply the path below:"

read path

echo" "

echo"Supply the pattern below:"

read pattern

cat$path|grep-E-v"^\s*($|"$pattern")"

Save it as strip.sh. First, chmod it rightly :

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chmod+xstrip.sh

then execute it :

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sh strip.sh

It will ask for the path, you will enter the whole path or relative path :

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/etc/php5/cgi/php.ini

and hit the return key/enter. Then it will ask for the pattern, for php.ini this pattern was ;, if it was other file, like Nginx config file, it would be #, for CSS or PHP it could be / or //, so on, so type it :

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;

and hit the return key. Quite obviously, you can directly wget the RAW file from the GitHub repo. Follow the repo owner or fork it to remember the simple thing.

Self Hosted Schema.org and Microformats Free Checking Tools can easily be hosted on any free Platform as a Service (PaaS) or cloud server or with your website. We typically in schooling said these type of tools as scripts. Nowadays with the possible more usage of mobile devices, people refer them as Apps. What ever they […]